World War II Service (Steven Rogers)

During the war, "Cap" served as both a symbol of freedom and America's most effective special operative. In addition to working with his young sidekick Bucky, Cap regularly fought alongside other Allied super-powered heroes such as Namor the Sub-Mariner and the android Human Torch, who were the recognized core of the World War II super-team known as the Invaders - a name suggested by English premier Winston Churchill. Rogers sometimes came into contact with a Canadian paratrooper named Jim Howlett, the man who would come to be known as Wolverine.

Rogers faced fascist Germans and imperialist Japanese. Among his foes and adventures were battles with George Maxon, who was an impostor Red Skull, the White Death, the Legion of Unholy Beggars, the Dragon of Death, the Reaper, the Black Toad, the Black Talon, Stryker, Doctor Crime, Mock Mikado, Master Man and the Super-Axis, Togaro, Prophet of Hate, Agent Axis, the Shark, the Hyena, N2 and Mister Sinister, Dr. Togu, Doctor Destiny, Snapper, Jack the Ripper and Terdu, Dormammu, HYDRA, the Hand, the Grandmaster, the Ringmaster, Baron Zemo, Colonel Von Wagner, Fang (who later died in Hiroshima and thus became one with the Everwraith), and the Butterfly. He also prevented the murder of President F.D. Roosevelt by a group called the Defenders, the Battle of the Bulge, D-Day, stopping saboteurs (early March 1941), meeting Wakandans, saving President Roosevelt from a deranged Namor, meeting Nikola Tesla, saving a Manhattan Project scientist from Red Skull with the help of the Howling Commandos, stopping (with Howling Commando support) the Red Skull's plot

For a time, World War II Bucky fought alongside a time-displaced modern-era Captain America until the Avengers recovered their colleague to the present day.